Cc1c([N+](=O)[O-])cc([N+](=O)[O-])c(O)c1[N+](=O)[O-] mol10091 0_1 Cc1c([N+](=O)[O-])cc([N+](=O)[O-])c([O-])c1[N+](=O)[O-] mol10091 -1_1